Besides counseling and other mundane methods of keeping the peace and healing the family, you can try something that binds the anger and promotes a healing atmosphere. How you go about it will depend on what you want to do.

If she doesn't have time or the awesome affordable health care obama has put in place! Here's a a couple of links I found on YouTube for you. Try and share them with Your mother. If she has a phone you can download you-tube plug in some head phones and ask her to sit down once a day close her eyes and just listen :) I usually meditate before I go to bed. Or if my energy is high I stop my self for 20 mins any time of the day and relax.
GOOD LUCK.
http://youtu.be/wkRqhnHghs0

Except that using magic as a last resort is a personal moral. In a siutation like this, mundane steps do need to be taken, but people can resort to magic on the first try along with actions they would normally take.

There's actually lore behind that. Alyssum is a flower that consists of [a] + [lyssa] or anti-madness/fury/rabies. Lyssa was a being in Hellenic lore that caused the madness in Heracles that ended up with his loved ones dead.

So instead of Alyssum being used to settle your typical anger, it would be more for calming one down from a rage or pulling them out of "madness" (spiritually, and not medicinally, of course).

Magical Uses: Used as an amulet to "expel charms." Hung in the house, it protects against fascination, a magical process known as "glamour." Alyssum can also cool down an angry person if put in the hand or on the body of the angry person.

Or instead of trying to fix your mom, because that could become a lifetime of work for you to try to fix everybody who causes you pain in life, you may want to practice sheilding. If you are already practicing sheilding I am curious to know what method you use. If not, then I can guide you or you can search it in the forums.